Corrosion of the metal parts of diesel engines in biodiesel-based fuels

Xuan Phuong Nguyen  -  Ho Chi Minh city University of Transport, Ho Chi Minh City, Viet Nam
*Hai Nam Vu  -  Ho Chi Minh city University of Transport, Viet Nam
Received: 31 May 2018; Revised: 15 Mar 2019; Accepted: 5 Apr 2019; Published: 13 Jun 2019; Available online: 15 Jul 2019.
Open Access Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Biodiesel, an environmentally-friendly bio-fuel, has been regarded as one of the most promising alternatives to fossil fuels whose use is rampant in the transportation sector. However, it is important that the corrosive effects of this fuel on engines are studied. This work reviews the corrosiveness that biodiesel exerts on various engine components, especially those made out of metals. First, an analysis of the corrosion mechanisms of metals exposed to biodiesel is provided. The conventional and advanced analysis methods will be applied to measure the level of corrosiveness in static immersion test, and to assess the formation of secondary products, if any, in biodiesel and any metal strips in contact with biodiesel-based fuel. The use of inhibitions to guard against corrosion will be mentioned. Lastly, several significant causes of metal corrosion, namely, the presence of dissolved oxygen and oxidation products, TAN change, a rise in dissolved water, the presence of metals, and the changes in biodiesel properties will also be presented. ©2019. CBIORE-IJRED. All rights reserved
Keywords: biodiesel; corrosion; metal; analysis techniques; inhibitor

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